EFFLUENT TANKS MASTIC SEALED - BRISTOL These new stainless steel effluent/aeration tanks needed the sectional panel joints mastic sealed with Sikaflex TS Plus to ensure their watertighness. The stainless wall had to be chemically primed and the concrete floor mechanically prepped and primed to promote the adhesion of the product to be applied. The TS Plus was mechanically gunned on and evened off with spatulas leaving a nice tidy job.